Identical to the ENARDO C.C. Knives (Black and White with locking blades). A classic of an effect, The color changing knives. Change a white knife to a black knife and a black knife to a white knife. Then make it disappear and reappear in your pocket.

Bonus- this Enardoe knife is ALSO an "open-no open" knife. It only opens if you know the secret! You can open it, but no one else can.